21131133011 has 16 divisors (see below), whose sum is σ = 22518803040. Its totient is φ = 19790749440.

The previous prime is 21131133007. The next prime is 21131133017. The reversal of 21131133011 is 11033113112.

It is not a de Polignac number, because 21131133011 - 2² = 21131133007 is a prime.

It is a super-2 number, since 2×21131133011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21131133017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325415 + ... + 384911.

It is an arithmetic number, because the mean of its divisors is an integer number (1407425190).

Almost surely, 2^21131133011 is an apocalyptic number.

21131133011 is a deficient number, since it is larger than the sum of its proper divisors (1387670029).

21131133011 is a wasteful number, since it uses less digits than its factorization.

21131133011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59894.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 21131133011 its reverse (11033113112), we get a palindrome (32164246123).

The spelling of 21131133011 in words is "twenty-one billion, one hundred thirty-one million, one hundred thirty-three thousand, eleven".